CN113070405A - Section stretch bending die with replaceable template piece and assembling method thereof - Google Patents

Section stretch bending die with replaceable template piece and assembling method thereof Download PDF

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Publication number
CN113070405A
CN113070405A CN202110498375.5A CN202110498375A CN113070405A CN 113070405 A CN113070405 A CN 113070405A CN 202110498375 A CN202110498375 A CN 202110498375A CN 113070405 A CN113070405 A CN 113070405A
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China
Prior art keywords
template
bottom plate
screw rod
positioning seat
stretch bending
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Pending
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CN202110498375.5A
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Chinese (zh)
Inventor
刘志文
孙凯博
陈景然
肖玲
李发智
曹远龙
李必文
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Nanhua University
University of South China
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Nanhua University
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Publication date
Application filed by Nanhua University filed Critical Nanhua University
Priority to CN202110498375.5A priority Critical patent/CN113070405A/en
Publication of CN113070405A publication Critical patent/CN113070405A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/10Die sets; Pillar guides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/04Movable or exchangeable mountings for tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00Bending rods, profiles, or tubes
    • B21D7/08Bending rods, profiles, or tubes by passing between rollers or through a curved die
    • B21D7/085Bending rods, profiles, or tubes by passing between rollers or through a curved die by passing through a curved die

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

A section stretch bending die with a replaceable template piece and a replacement method relate to the technical field of dies. The section stretch bending die with the replaceable template piece comprises a bottom plate, a template and a pressing and abutting assembly; the template is arranged on the bottom plate in a manner of being vertical to the bottom plate, and the surfaces of two sides of the template, which are vertical to the bottom plate, are respectively a working surface and a non-working surface; the multiunit compresses tightly conflict subassembly detachable and installs on the bottom plate, compresses tightly conflict subassembly on the one hand and offsets with the non-working face of template, and on the other hand to the template on the thickness face application of force and compress tightly the template on the bottom plate. A stretch bending die assembly method is based on a section stretch bending die with a replaceable template piece. The invention has the advantages that the template is an integrally formed plate, when the stretch bending operation is carried out, the working surface of the template can be attached to the whole surface of the section, and the problems of indentation and corrugation caused by concentrated compressive stress do not exist.

Description

Section stretch bending die with replaceable template piece and assembling method thereof
Technical Field
The invention relates to the technical field of dies, in particular to a section stretch bending die with a replaceable template piece and a replacement method.
Background
The aluminum profile has the advantages of low density, high strength, good collision performance, recoverability, no pollution and the like, and is an ideal lightweight material for automobiles. Aluminum profiles for vehicle bodies are often required to be bent to a certain curvature in view of aerodynamic, styling and performance requirements. The most common processing method for aluminum profiles for vehicle bodies is to use a stretch bending die and a profile stretch bending machine for stretch bending.
The stretch bending die is a key factor influencing the stretch bending size precision and the processing cost of the section. After the aluminum profile is subjected to stretch bending operation, the problem of resilience inevitably exists, so in the early-stage design of the stretch bending die, repeated die trial (trial die) and die repair (die modification) are required according to the bending curvature required by the aluminum profile and the resilience degree of the aluminum profile after stretch bending.
The structure of a traditional section stretch bending die is shown in fig. 3, and comprises a die main body 5, a base 6 and a shaping plate 7; the die main body 5 is fixedly installed on the base 6, and the shaping plate 7 is fixedly installed on one side surface of the die main body 5 by arc welding. The section stretch bending die has the following defects in practical use: the shaping plate is matched with the side profile of the mould main body, and the mould main body can only be matched with the shaping plate with one size and shape and has no universality. When the method is applied to stretch bending manufacturing of a new product, repeated trial molding (trial mold) and die repairing (mold modification) are needed, however, the whole stretch bending mold needs to be produced again each time aiming at fine size or curvature modification of the setting plate, on one hand, the cost of the stretch bending process is increased, and on the other hand, the production efficiency of the section is slowed down.
Based on the above defects, technicians in the industry are always dedicated to designing a stretch-bending forming die with universality so as to be suitable for fixing and clamping die plates with different curvatures, thereby achieving the effects of reducing the manufacturing cost and improving the production efficiency.
The invention patent with publication number CN112474932 discloses a multifunctional aluminum profile stretch-bending forming die. The die comprises a tool bottom plate and a plurality of radian positioning block slideways which are fixedly installed on the tool bottom plate in a radial manner, wherein radian positioning blocks are slidably installed on the radian positioning slideways. The bending requirements of aluminum alloy sections with different curvatures can be met by adjusting the positions of the radian positioning blocks in the radian positioning slideways. The stretch bending forming die solves the problem that the existing aluminum alloy section stretch bending tool is not universal.
However, when the stretch bending forming die is used for stretch bending, the radian positioning block is in line contact or narrow surface contact (local contact) with the inner arc surface of the aluminum alloy section, the inner arc surface of the aluminum alloy section can generate indentation and wrinkling phenomena due to the concentration of compressive stress, and the smaller the bending curvature is, the more serious the indentation and wrinkling phenomena are, so that the product quality of a stretch bending piece is affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a section stretch bending die with a replaceable template piece and an assembly method thereof, which solve the problem that the existing stretch bending forming die with adjustable curvature cannot be completely attached to the inner arc surface of a section, so that indentation and wrinkling are caused due to the concentrated local area compressive stress when stretch bending operation is performed.
The technical scheme of the invention is as follows: the section stretch bending die with the replaceable template piece comprises a bottom plate, a template and a pressing and abutting assembly; the template is an integrally formed arc-shaped plate and is arranged on the bottom plate in a manner of being vertical to the bottom plate, the surfaces of the two sides of the template, which are vertical to the bottom plate, are respectively a working surface and a non-working surface, the edge surface of the template, which faces the bottom plate, is a lower thickness surface, and the edge surface, which is back to the bottom plate, is an upper thickness surface; the multiunit compresses tightly conflict subassembly detachable and installs on the bottom plate to be located the one side of template non-working face, and arrange along the extending direction interval of template, compress tightly the conflict subassembly on the one hand and offset with the non-working face of template, on the other hand to the template on the thickness face application of force and compress tightly the template on the bottom plate.
The further technical scheme of the invention is as follows: the pressing and abutting assembly comprises a positioning seat, a transverse screw rod, an abutting block, an upper pressing plate and a vertical screw rod; the positioning seat is detachably connected to the bottom plate, and a threaded hole is formed in the positioning seat; the transverse screw rod is in threaded connection with the threaded hole of the positioning seat, and one end of the transverse screw rod faces to the non-working surface of the template; the abutting block is arranged on the positioning seat and positioned between the transverse screw rod and the non-working surface of the template, and the abutting block B is pushed by the transverse screw rod to abut against the non-working surface of the template; one end of the upper pressure plate is placed on the upper thickness surface of the template, the other end of the upper pressure plate is placed on the positioning seat, and a through waist-shaped hole is formed in the upper pressure plate; the lower end of the vertical screw rod is detachably connected to the bottom plate, the upper end of the vertical screw rod penetrates out of the waist-shaped hole of the upper pressure plate, and the upper pressure plate is tightly pressed on the template and the positioning seat through the gasket sleeved on the vertical screw rod and the nut connected to the vertical screw rod through threads.
The invention further adopts the technical scheme that: a plurality of mounting holes are formed in the bottom plate; the positioning seat and the vertical screw are detachably connected to the mounting hole of the bottom plate through a connecting piece respectively; when the locating seat is connected on the different mounting holes of bottom plate, the locating seat is in the different positions on the bottom plate, when vertical screw rod is connected on the different mounting holes of bottom plate, vertical screw rod is in the different positions on the bottom plate.
The further technical scheme of the invention is as follows: the pressing and collision components are three groups; the distribution positions of the three groups of pressing and abutting assemblies respectively correspond to the middle part and the two ends of the template in the extension direction.
The further technical scheme of the invention is as follows: the number of the threaded holes on the positioning seat is not less than two; all threaded holes on one positioning seat are arranged at equal intervals and are arranged at equal height relative to the bottom plate.
The further technical scheme of the invention is as follows: and a height-adjusting cushion block is arranged between the lower thickness surface of the template and the bottom plate.
The technical scheme of the invention is as follows: a stretch bending die assembly method is based on the section stretch bending die with the replaceable die plate piece, and the method can realize the assembly and disassembly of the die plate pieces with different shapes on one set of stretch bending die; the operation is as follows:
s01, selecting a template with a corresponding radian according to the stretch bending radian required by the profile process and considering the resilience of the profile after stretch bending;
s02, presetting a placing area of the template on the bottom plate, and then presetting installation areas of the three groups of pressing and abutting assemblies on the bottom plate, ensuring that the three groups of pressing and abutting assemblies are all positioned at one side of a non-working surface of the template and respectively correspond to the middle part and two ends of the template in the extension direction;
s03, connecting the three positioning seats and the three vertical screw rods to corresponding mounting holes on the bottom plate through connecting pieces respectively according to a preset mounting area; placing the template on the bottom plate according to a preset placing area;
s04, placing the three abutting blocks between the three positioning seats and the non-working surface of the template respectively; then the upper pressure plate passes through the upper end socket of the vertical screw through the waist-shaped hole on the upper pressure plate and is placed on the positioning seat and the template; then, the upper pressure plate is tightly pressed on the template and the positioning seat through a gasket sleeved on the vertical screw rod and a nut in threaded connection with the vertical screw rod; and finally, screwing the transverse screw rod into a threaded hole in the positioning seat, and pushing the abutting block through the transverse screw rod to enable the abutting block to be in contact with the non-working surface of the template, so that the assembly of the stretch bending die is completed.
Compared with the prior art, the invention has the following advantages:
on one hand, the template is an integrally formed plate, when stretch bending operation is performed, the working surface of the template can be attached to the whole surface of the section bar, and the problem of wrinkling caused by concentrated compressive stress is solved; on the other hand, the quick assembly and disassembly of template pieces in different shapes can be realized on one set of stretch bending die, the product universality is improved, when the stretch bending die is applied to stretch bending manufacture of a new product section, the manufacturing cost of the stretch bending die can be greatly reduced, and further the production efficiency of a bent section piece is improved.
The invention is further described below with reference to the figures and examples.
Drawings
FIG. 1 is a schematic diagram of the present invention from one perspective;
FIG. 2 is a schematic view of the present invention from another perspective;
fig. 3 is a schematic structural diagram of a conventional section stretch bending die.
Description of the drawings: in order to facilitate understanding of the working process of the stretch bending die, fig. 1 to 3 all show the section bar to be unloaded after stretch bending forming.
Illustration of the drawings: a base plate 1; a mounting hole 11; a template 2; a non-working surface 21; an upper thickness surface 22; a working surface 23; a positioning seat 31; a transverse screw 32; a resisting block 33; an upper platen 34; a vertical screw 35; a spacer 36; a nut 37; a height-adjusting cushion block 4; a mold main body 5; a bottom plate 6; and a sizing plate 7.
Detailed Description
Example 1:
as shown in fig. 1, the section stretch bending die with replaceable die plate comprises a bottom plate 1, a die plate 2 and a pressing abutting assembly.
The base plate 1 is provided with a plurality of mounting holes 11.
The template 2 is an integrally formed arc-shaped plate, and is perpendicular to the bottom plate 1 and arranged on the bottom plate 1, the two side surfaces of the template 2 perpendicular to the bottom plate 1 are respectively a working surface 23 and a non-working surface 21, the edge surface of the template 2 facing the bottom plate 1 is a lower thickness surface, and the edge surface of the template 2 facing away from the bottom plate 1 is an upper thickness surface 22.
Three groups compress tightly conflict subassembly detachable and install on bottom plate 1 to be located 2 non-working face 21's of template one side, three groups compress tightly the distribution position of conflict subassembly and correspond 2 extending direction's of template middle part and both ends respectively. The pressing and abutting assembly comprises a positioning seat 31, a transverse screw 32, a abutting block 33, an upper pressing plate 34 and a vertical screw 35. The positioning seat 31 is detachably connected to the mounting hole 11 of the base plate 1 through a connecting piece (a bolt and a nut), when the positioning seat 31 is connected to different mounting holes 11 of the base plate 1, the positioning seat 31 is located at different positions on the base plate 1, and the positioning seat 31 is provided with a threaded hole. The transverse screw 32 is screwed into a threaded hole of the positioning seat 31, with one end facing the non-working surface 21 of the formwork 2. The abutting block 33 is placed on the positioning seat 31 and located between the transverse screw rod 32 and the non-working surface 23 of the formwork 2, and the abutting block B33 is pushed by the end of the transverse screw rod 32 to abut against the non-working surface 23 of the formwork 2. One end of the upper pressure plate 34 is placed on the upper thickness surface 22 of the formwork 2, and the other end is placed on the positioning seat 31, and a through waist-shaped hole 341 is formed in the upper pressure plate. The lower end of the vertical screw 35 is detachably connected to the mounting hole 11 of the bottom plate 1 through a connecting piece (nut), the upper end of the vertical screw penetrates out of the waist-shaped hole 341 of the upper pressure plate 34, the upper pressure plate 34 is pressed on the template 2 and the positioning seat 31 through the gasket 36 sleeved on the vertical screw 35 and the nut 37 in threaded connection with the vertical screw 35, and when the vertical screw 35 is connected to different mounting holes 1 of the bottom plate 1, the vertical screw 35 is located at different positions on the bottom plate 1. The pressing and abutting assembly abuts against the non-working surface 21 of the template 2 through the abutting block 33 on one hand, and presses the template 2 on the bottom plate 1 by applying force to the upper thickness surface 22 of the template 2 through the upper pressing plate 34 on the other hand.
Preferably, a height-adjusting cushion block 4 is arranged between the lower thickness surface of the template 2 and the bottom plate 1.
Preferably, the number of the threaded holes on the positioning seat 31 is not less than two. All threaded holes on one positioning seat 31 are equally spaced and equally high relative to the base plate.
Briefly describing the assembly method of the present invention:
1. selecting a template 2 with a corresponding radian according to the stretch bending radian required by the profile process and considering the resilience of the profile after stretch bending;
2. presetting a placing area of the template 2 on the bottom plate 1, and presetting installation areas of three groups of compression and collision components on the bottom plate 1, so as to ensure that the three groups of compression and collision components are all positioned at one side of a non-working surface 21 of the template 2 and respectively correspond to the middle part and two ends of the template 2 in the extension direction;
3. according to a preset installation area, the three positioning seats 31 and the three vertical screw rods 35 are respectively connected to corresponding installation holes 11 on the bottom plate 1 through connecting pieces; placing the template 2 on the bottom plate 1 according to a preset placing area;
4. firstly, respectively placing three abutting blocks 33 between the three positioning seats 31 and the non-working surface 21 of the template 2; then the upper pressing plate 34 passes through the upper end head of the vertical screw 35 through the waist-shaped hole 341 on the upper pressing plate and is placed on the positioning seat 31 and the template 2; then, the upper pressure plate 34 is tightly pressed on the template 2 and the positioning seat 31 through a gasket 36 sleeved on the vertical screw rod 35 and a nut 37 in threaded connection with the vertical screw rod 35; finally, the transverse screw 32 is screwed into the threaded hole on the positioning seat 31, and the transverse screw 32 pushes the abutting block 33, so that the abutting block 33 is in contact with the non-working surface 21 of the template 2, and the assembly of the stretch bending mold is completed.
The disassembly method of the present invention is the reverse of the assembly method.
Briefly describing the method of use of the present invention:
the two ends of the profile are fixed on a stretch bender, and the stretch bender is started to bend the profile around the working surface 23 of the template 2. And after the stretch bending of the section is finished, the section is detached from the stretch bending machine, and the whole stretch bending process of the section is finished.

Claims (7)

1. Section bar stretch bending mould of removable template spare, characterized by: comprises a bottom plate, a template and a pressing and abutting assembly; the template is an integrally formed arc-shaped plate and is arranged on the bottom plate in a manner of being vertical to the bottom plate, the surfaces of the two sides of the template, which are vertical to the bottom plate, are respectively a working surface and a non-working surface, the edge surface of the template, which faces the bottom plate, is a lower thickness surface, and the edge surface, which is back to the bottom plate, is an upper thickness surface; the multiunit compresses tightly conflict subassembly detachable and installs on the bottom plate to be located the one side of template non-working face, and arrange along the extending direction interval of template, compress tightly the conflict subassembly on the one hand and offset with the non-working face of template, on the other hand to the template on the thickness face application of force and compress tightly the template on the bottom plate.
2. The stretch-bending die for the section bar with the replaceable template element as claimed in claim 1, wherein: the pressing and abutting assembly comprises a positioning seat, a transverse screw rod, an abutting block, an upper pressing plate and a vertical screw rod; the positioning seat is detachably connected to the bottom plate, and a threaded hole is formed in the positioning seat; the transverse screw rod is in threaded connection with the threaded hole of the positioning seat, and one end of the transverse screw rod faces to the non-working surface of the template; the abutting block is arranged on the positioning seat and positioned between the transverse screw rod and the non-working surface of the template, and the abutting block B is pushed by the transverse screw rod to abut against the non-working surface of the template; one end of the upper pressure plate is placed on the upper thickness surface of the template, the other end of the upper pressure plate is placed on the positioning seat, and a through waist-shaped hole is formed in the upper pressure plate; the lower end of the vertical screw rod is detachably connected to the bottom plate, the upper end of the vertical screw rod penetrates out of the waist-shaped hole of the upper pressure plate, and the upper pressure plate is tightly pressed on the template and the positioning seat through the gasket sleeved on the vertical screw rod and the nut connected to the vertical screw rod through threads.
3. The stretch-bending die for the section bar with the replaceable template element as claimed in claim 2, wherein: a plurality of mounting holes are formed in the bottom plate; the positioning seat and the vertical screw are detachably connected to the mounting hole of the bottom plate through a connecting piece respectively; when the locating seat is connected on the different mounting holes of bottom plate, the locating seat is in the different positions on the bottom plate, when vertical screw rod is connected on the different mounting holes of bottom plate, vertical screw rod is in the different positions on the bottom plate.
4. A stretch-bending die for a profile with replaceable die plate members as claimed in claim 2 or 3, wherein: the pressing and collision components are three groups; the distribution positions of the three groups of pressing and abutting assemblies respectively correspond to the middle part and the two ends of the template in the extension direction.
5. The stretch-bending die for the section bar with the replaceable template element as claimed in claim 4, wherein: the number of the threaded holes on the positioning seat is not less than two; all threaded holes on one positioning seat are arranged at equal intervals and are arranged at equal height relative to the bottom plate.
6. The stretch-bending die for the section bar with the replaceable template element as claimed in claim 5, wherein: and a height-adjusting cushion block is arranged between the lower thickness surface of the template and the bottom plate.
7. A stretch bending die assembly method based on the section stretch bending die with the replaceable template part as claimed in any one of claims 4 to 6, which is characterized in that: by the method, the loading and unloading of the template pieces with different shapes can be realized on one set of stretch bending die; the operation is as follows:
s01, selecting a template with a corresponding radian according to the stretch bending radian required by the profile process and considering the resilience of the profile after stretch bending;
s02, presetting a placing area of the template on the bottom plate, and then presetting installation areas of the three groups of pressing and abutting assemblies on the bottom plate, ensuring that the three groups of pressing and abutting assemblies are all positioned at one side of a non-working surface of the template and respectively correspond to the middle part and two ends of the template in the extension direction;
s03, connecting the three positioning seats and the three vertical screw rods to corresponding mounting holes on the bottom plate through connecting pieces respectively according to a preset mounting area; placing the template on the bottom plate according to a preset placing area;
s04, placing the three abutting blocks between the three positioning seats and the non-working surface of the template respectively; then the upper pressure plate passes through the upper end socket of the vertical screw through the waist-shaped hole on the upper pressure plate and is placed on the positioning seat and the template; then, the upper pressure plate is tightly pressed on the template and the positioning seat through a gasket sleeved on the vertical screw rod and a nut in threaded connection with the vertical screw rod; and finally, screwing the transverse screw rod into a threaded hole in the positioning seat, and pushing the abutting block through the transverse screw rod to enable the abutting block to be in contact with the non-working surface of the template, so that the assembly of the stretch bending die is completed.
CN202110498375.5A 2021-05-08 2021-05-08 Section stretch bending die with replaceable template piece and assembling method thereof Pending CN113070405A (en)

Priority Applications (1)

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CN202110498375.5A CN113070405A (en) 2021-05-08 2021-05-08 Section stretch bending die with replaceable template piece and assembling method thereof

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Application Number Priority Date Filing Date Title
CN202110498375.5A CN113070405A (en) 2021-05-08 2021-05-08 Section stretch bending die with replaceable template piece and assembling method thereof

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116833272A (en) * 2023-09-01 2023-10-03 新乡市锦运汽车配件有限公司 Aluminum profile arc bending device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0882528A1 (en) * 1997-06-02 1998-12-09 Kvaerner Masa-Yards Oy Bending arrangement for aluminium profile
JP2000094040A (en) * 1998-09-21 2000-04-04 Amada Co Ltd Method and device for plate bending
CN101518802A (en) * 2008-02-25 2009-09-02 西北工业大学 Stretch-bending forming die and forming method
CN210475115U (en) * 2020-03-11 2020-05-08 广东高谱弯曲技术有限公司 Section bar chuck for stretch bender
CN111266443A (en) * 2020-03-11 2020-06-12 广东高谱弯曲技术有限公司 Working platform of stretch bender and stretch bending method thereof
CN215237009U (en) * 2021-05-08 2021-12-21 南华大学 Section bar stretch bending die with replaceable template piece

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0882528A1 (en) * 1997-06-02 1998-12-09 Kvaerner Masa-Yards Oy Bending arrangement for aluminium profile
JP2000094040A (en) * 1998-09-21 2000-04-04 Amada Co Ltd Method and device for plate bending
CN101518802A (en) * 2008-02-25 2009-09-02 西北工业大学 Stretch-bending forming die and forming method
CN210475115U (en) * 2020-03-11 2020-05-08 广东高谱弯曲技术有限公司 Section bar chuck for stretch bender
CN111266443A (en) * 2020-03-11 2020-06-12 广东高谱弯曲技术有限公司 Working platform of stretch bender and stretch bending method thereof
CN215237009U (en) * 2021-05-08 2021-12-21 南华大学 Section bar stretch bending die with replaceable template piece

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116833272A (en) * 2023-09-01 2023-10-03 新乡市锦运汽车配件有限公司 Aluminum profile arc bending device
CN116833272B (en) * 2023-09-01 2023-11-17 新乡市锦运汽车配件有限公司 Aluminum profile arc bending device

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Application publication date: 20210706

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